Oil temperature

NevadaWhiteCupra300

Active Member
Oct 4, 2020
11
4
What’s the ideal oil temperature to reach before putting your foot down? The majority of journeys are to and from work, which takes less than 15 minutes, so I very rarely boot the car, as I know that the oil will still be cold. Which made me think which temperature is the target before switching to Cupra mode and letting loose
 

Damo H

Carbon Snob
Staff member
Moderator
Oct 3, 2012
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Car Length In Front
Revo remaps on these don't give you any extra power until engine temp is above 70 dgrees, so that's a good indicator. Personally 80 degrees.
 

CupraGeezer

Active Member
May 11, 2018
335
145
The attached graph shows viscosity vs temperature. 5W-30 has a viscosity of 161 cSt at 20 deg.C, reducing to 10 cSt at 100 deg.C.

This gives an idea of the impact of nailing an engine from cold. I wait until 80 deg.C, by which time the viscosity has dropped to 17 cSt. This is close enough to the fully warm temperature in my book.
graph_4_viscosity_comparison.jpg
 
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SuperV8

Active Member
May 30, 2019
204
86
I think its more to do with temperature gradients across different parts of the engine - rather than the viscosity of the oil.

You don't want to give full load to a cold engine, due to a cold block and dumping lots of heat into the cylinders - causes large thermal stresses withing the engine. One of the reasons Rover K series head gaskets used to fail.
 
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SRGTD

Active Member
May 26, 2014
1,188
533
90 for me. I have oil temp displayed on the MFD pretty much all the time.
 
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